Looks like a good UHF antenna and a decent VHF (the long folded element is the VHF, not sure how well it will perform on VHF (just the one element) but 50 miles is good.. Most Digital is UHF and that looks like a very good UHF antenna. Of course I'm going on appearance, and training and antenna design theory all of which goes to trash if the dimensions are off by a small amount.
How to tell if the station you want to watch is VHF lo, VHF hi or UHF
Two ways.. If you have yet to detect it.. ANTENNA HELPER FREE for yoru phone will give you lots and lots of info on television stations "Near" you.. Including the display channel (IE: 7-1) the Carrier hannel (42) and the location (Roughly 10 mile Evergreen, Southfield, MI for the specific station I'm using as an example)
That is a UHF station (42)
Or Display channel 2-1,, Carrier channel 7,, 9 Mile west of Greenfield, Southfield MI This is a VHF-HI (7) station.
2,3,4,5,6 are VHF low (Carrier) 7-12 HI 13 and up UFH, but as you can see the CARRIER is often not the same as the display channel.. NOTE
Channel 12 flint.. really is channel 12
The app also gives you Vector (Distance and direction) from wherever you are standing when you invoke it to the tower site (Very useful)
I mentioned a 2nd way.... On many TV's once you DETECT a station you can ask the TV what the carrier is... Menu, setup channel edit is the most common path Or Signal Strength on some menus.
I use those features in conjunction with my Sensar Pro to peak.